Agilent Technologies 3000 X-Series Instrukcja Obsługi Pobierz pdf (Strona 63)

Capturing Data 3

Agilent 3000 Series Oscilloscopes User’s Guide 63

Oscilloscope Bandwidth and Sample Rate

An oscilloscope’s bandwidth is typically described as the lowest frequency

at which input signal sine waves are attenuated by 3 dB (- 30% amplitude

error).

At the oscilloscope bandwidth, sampling theory says the required sample

rate is f

=2f

. However, the theory assumes there are no frequency

components above f

MAX

in this case) and it requires a system with

an ideal brick- wall frequency response.

Figure 27 Alaising

1 2 ... 58 59 60 61 62 63 64 65 66 67 68 ... 155 156

Agilent 3000 Series 1
Oscilloscopes 1
In This Book 4
Contents 10
Getting Started 17
Getting Started 1 19
Figure 1 Package Contents 19
1Getting Started 20
Table 1 Power Cords 20
Step 4. Input a waveform 23
Using the Oscilloscope Menus 26
Figure 5 Oscilloscope Display 28
Step 7. Use Auto-Scale 29
Step 8. Compensate probes 31
High Frequency Compensation 32
Displaying Data 35
Using the Horizontal Controls 36
Displaying Data 2 37
Slow Scan Mode 38
Zoomed window 40
Zoomed window view 40
X-Y Format 41
To reset the trigger offset 42
To specify a trigger holdoff 42
To view the sample rate 43
Using the Vertical Controls 44
To adjust the vertical scale 45
To specify channel coupling 46
DC Coupling 47
DC Coupling Status 47
AC Coupling 47
AC Coupling Status 47
To specify a bandwidth limit 48
20 MHz Bandwidth 49
Bandwidth ON Status 49
Bandwidth limit OFF 49
Probe Attenuation 50
To use a digital filter 51
To invert a waveform 51
2 Displaying Data 52
Using Math Function Waveforms 53
FFT Resolution 56
To save a reference waveform 57
To change the grid 58
To use waveform persistence 59
To clear the display 59
To invert screen colors 60
Capturing Data 61
Sampling Theory 62
Aliasing 62
Oscilloscope Rise Time 65
Memory Depth and Sample Rate 67
Choosing the Sampling Mode 68
Choosing the Acquisition Mode 72
Capturing Data 3 73
To adjust the trigger level 76
To force a trigger 77
To set up edge triggers 78
To set up video triggers 80
To set the trigger sweep 82
To set the trigger coupling 82
To record waveforms 83
To play-back waveforms 84
To store recorded waveforms 86
Making Measurements 87
Vpp (Peak-to-Peak Voltage) 90
Overshoot 92
Preshoot 92
Frequency 93
Rise Time 94
Fall Time 94
Positive Pulse Width 95
Negative Pulse Width 95
Positive Duty Cycle 95
Negative Duty Cycle 95
Delay Between Rising Edges 96
Delay Between Falling Edges 96
Counter (Frequency) 96
Making Measurements 4 97
Making Cursor Measurements 98
To save and load waveforms 102
Supported Printers 110
Oscilloscope Utility Settings 111
To enable/disable mask tests 112
To run/stop a mask test 112
To set up masks 114
Setting IO Parameters 115
Setting the Menu Language 115
Turning Sound ON or OFF 116
Displaying System Information 116
To perform screen tests 117
To perform key tests 117
Running Self-Calibration 118
Specifications 120
Characteristics 121
→2 ), Hardware Counter 124
Table 12 Power Requirements 125
Table 14 Other 125
Testing Performance 128
Before Testing Performance 129
DC Gain Accuracy Test 130
Procedure 131
Specification 136
Equipment Required 136
Connections 136
Service 8 139
Vpp reading 141
Performance Test Record 144
Contacting Agilent 146
Warnings 147
To clean the instrument 148
Safety Symbols 149
ASafety Notices 150
*D3000-97017* 156

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